缺测潮位补齐方法的比较分析

Comparative Analysis on the Tidal Data Repaired Methods

简要介绍了利用二次抛物线拟合法、自报值循环逼近法和参数法进行缺测潮位数据补齐的原理和适用范围,对实测潮位资料的不连续进行数据补齐。选取4个不同潮汐类型的验潮站(小麦岛、龙口、涠洲、海口),对缺测数据,采用二次抛物线拟合法和自报值循环逼近法进行补齐。选取文登、乳山口、千里岩3个验潮站,对缺测数据采用参数法进行补齐。结果表明,3种方法对于缺测潮位的补齐均具有可靠性和实用性。二次抛物线拟合法和参数法补齐精度较高,自报值循环逼近法和参数法可补齐较长时段的缺测潮位,二次抛物线拟合法和自报值循环逼近法无需临近验潮站同步实测数据。在工程应用中,需根据缺测时段及时长选择合适的方法。

This paper briefly introduces the principles and methods of quadratic parabola fitting, iterative approximation method of self-reported values and parametric method to repair discontinuous tidal data. Four tidal gauge stations（Xiaomaidao, Longkou, Weizhou and Haikou） with different tidal types are selected with a series of data records, repairing the discontinuous data records by the first two methods. The three tidal gauge stations of Wendeng, Rushankou and Qianliyan are selected with a series of data records at the same time, repairing the discontinuous data records by the parametric method. The results show that the three methods are reliable and practical for filling the missing tidal data records. The quadratic parabola fitting and iterative approximation method of self-reported values have higher precision and can obtain the data records in a distance between two near tidal gauge stations, while the iterative approximation method of self-reported values and parametric method can supplement data records with a long period of lacking tidal data. In engineering applications, the appropriate method should be selected according to the duration of lacking tidal data records.